Lucy Mecklenburgh DID NOT get engaged in Vegas

The former TOWIE star shocked fans when she tweeted a picture of her left hand adorned with a big diamond ring on Monday. She accompanied the photo with the caption, "Oops!!! #whathappensinvegas" – and immediately her excited followers started to speculate about whether the 22-year-old was set to tie the knot.

Lucy posted this picture on Monday with the caption ""Oops!!! #whathappensinvegas"

But a few hours later, she confirmed she was just teasing.

"Only joking guys!" she tweeted. "Deffo didn't get married in Vegas."

Lucy is in Sin City for her friend Monica Cassidy's hen do. On Friday, she showed off her well-toned body as she posed for an Instagram snap wearing a black shoestring bikini. "Getting ready for a pool partyyyyy!! #Vegas," she wrote alongside the photo.

The former TOWIE star showed off her enviable figure in a bikini snap

During the pool party, the pretty brunette bumped into R&B star Ne-Yo, who is currently touring Las Vegas. Taking to Twitter with a photo of herself alongside the singer, she commented, "NORMAL DAY!!! With @NeYoCompound #OnlyinVegas."

A former reality star, Lucy has built up a successful diet and exercise brand, and often shares tips with her fans on how to keep fit.

Although she was slim before she started working out, Lucy has revealed she had her own body hang-ups.

Lucy, 22, bumped into R&B star NeYo in Vegas

"Before I started training I was still slim but I had a lot of cellulite on my bum, down my legs," she confessed. "I didn't have a lot of energy. I didn't feel healthy and I knew I needed to start training really.

"My biggest worry when I started training was getting too much muscle on my arms as I didn't want to lose the feminine look and just fitting it in really. I've got such a busy schedule. I think everyone uses that as an excuse… you just can't fit it in.

"Now I've started training I can't imagine not doing it, it's part of my life now and there's no excuse not to fit in an hour or two hours a week."